\documentclass{standalone}
\usepackage{tikz}
\usepackage{ctex,siunitx}
\setCJKmainfont{Noto Serif CJK SC}
\usepackage{tkz-euclide}
\usepackage{amsmath}
\usepackage{wasysym}
\usetikzlibrary{patterns, calc}
\usetikzlibrary {decorations.pathmorphing, decorations.pathreplacing, decorations.shapes,}
\begin{document}
\small
\begin{tikzpicture}[>=latex,scale=1.2]
  % \useasboundingbox(0.9,0)rectangle(5.1,5);
  \foreach \x in {.25,.75,-.25,-.75}
  {
      \draw[->] (-2,\x)--(2,\x);
  }
  \draw[->] (150:1.5)--+(-120:.8) node [below]{$v$};
  \draw[->] (-30:1.5)--+(60:.8) node [above]{$v$};
  \draw (.75*1.732+.25, -0.75)arc (0:60:.25)node [midway,above right]{$\omega t$};
  \draw [dashed](0,-1.2)--(0,2.2)node [right]{中性面};
  \draw [dashed] (0,0)--(-30:2.2); \draw [dashed] (0,0)--(150:2.2);
  \draw[rotate=-30] (-1.5,-.07)node[below=1mm]{$d$} rectangle (1.5,.07)node[above=1mm]{$a$};
  \draw[rotate=-30, fill=lightgray!20] (-1.5,0) circle (2.5pt);
  \fill[rotate=-30](-1.5,0) circle (0.8pt);
  \draw[rotate=-30, fill=lightgray!20] (1.5,0) circle (2.5pt) node{\tiny$\times$};
  \node at (2.2,0){$B$};
  \draw [<->] (0,1.8) arc (90:150:1.8)node[midway,above]{$\omega t$} ;
\end{tikzpicture}
\end{document}